The Metastable Helium Atom
UV laser source for atom optics experiments with metastable helium
... The technique utilises the interaction of intense laser light with helium metastables. The laser passes through a polarising beamsplitter (PBS) cube, and a A/4 plate is used to drive a transitions in the first ...
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Foundation experiments in quantum atom optics with ultracold metastable helium
... was observed in a thermal source of fermionic 3 He* using a similar experimental tech- nique [56]. Continuous beams of rubidium measured with a cavity The time-of-flight flux of single atoms can also be detected with a ...
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Ultracold collisions in metastable helium
... of metastable helium atoms are now widely used to study collision dynamics in dilute quantum gases as the large internal energy can be released during collisions, allowing novel experimental strategies ...
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Photoassociation of ultracold metastable helium
... Chapter 1 Introduction 1.1 Ultracold atoms Ultracold physics research has grown tremendously over recent decades to become a major force in the field of atomic physics. The successful cooling of gases to temperatures in ...
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Experiments with a Metastable Helium Atomic Trap
... an atom placed in a position-dependent magnetic ...An atom displaced to the right of the zero magnetic field position has its m J =-1 level closer to resonance with the field propagating from the right, the ...
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Ultracold collisions of metastable helium atoms
... S) atom by the symbol He * ...spin-polarized metastable atoms should remain ...spin-polarized metastable helium atoms, is pre- dicted to be large and positive, a necessary requirement for a ...
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The interaction of helium metastable atoms with metal surfaces
... 10 metastable atoms sec steradian were obtained from this ...resulting metastable atom ...produced metastable atoms in sufficient quantities to allow suitable experiments to be performed in ...
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Metastable aluminium atoms floating on the surface of helium nanodroplets
... 5 state, which arises from the promotion of one of the electrons from the full 3s orbital in the ground state to an unoccupied 3p orbital in the 4 P state. The key difference between this state and the ground electronic ...
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Radiative Decay Rates of Metastable Triplet Helium and Heliumlike Ions
... Needless to say, the study of atomic structure, and indeed the nature of matter itself, is not a new concept and has been of interest for thousands of years. Not until the 20th century, due to the work of physicists such ...
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Transition lifetime measurements and correlation experiments with ultra cold metastable helium
... guided atom laser beam and guided thermal atoms, across 3 vastly different ...the atom laser beam results in a smooth Gaussian mode profile, avoiding the formation of structure that is often present in ...
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Photoassociation of ultracold metastable helium
... i Abstract A theoretical analysis of photoassociation in ultracold metastable helium has been un- dertaken for the 2 3 S 1 + 2 3 S 1 to 2 3 S 1 + 2 3 P transition. A full multichannel calculation is ...
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5.61 Physical Chemistry 25 Helium Atom page 1 HELIUM ATOM
... Once Schrodinger had solved the Hydrogen atom, it was generally believed that the solution of the Helium atom would follow not long afterward. However, Scientists have tried for decades to solve this ...
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Helium atom. Chapter Classical dynamics of collinear helium. e e. He ++ CHAPTER 41. HELIUM ATOM 734
... 41.5.3 Cycle expansion results So far we have established a factorized form of the semiclassical spectral det- erminant and have thereby picked up two good quantum numbers; the quantum number m has been identified with ...
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Laser-intensity dependence of photoassociation in ultracold metastable helium
... spin-polarized metastable helium to the three lowest rovibrational levels of the J = 1, 0 u + state asymptoting to 2s 3 S 1 + 2p 3 P 0 is studied using a second-order perturbative treatment of the line ...
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Auger width of metastable states in antiprotonic helium II
... b Institute of Nuclear Research of the Hungarian Academy of Sciences H-4001 Debrecen, P.O.B. 51, Hungary Our previously proposed method for calculating the Auger-rates of metastable states in antiprotonic ...
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The Revision of the Alleged Spherical Atom Model of Helium
... published atom model for Helium, characterized by a double rotation of the electrons which exhibit perpendicular rotation ...the Helium atom, and that it must be ...
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Imprints from the solar cycle on the helium atom and helium pickup ion distributions
... neutral atom) He-related measurements, includ- ing Ulysses, SOHO, Wind, ACE, EUVE, Nozomi, Geotail, and IMAGE ...in helium of in- terstellar origin in the inner heliosphere and in its derivative He + pickup ...
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The Spherical Atom Model of Helium Based on the Theorem of Niels Bohr
... of Helium, based on Bohr’s theorem and recently published in [13], a spherical modification could be made by in- troducing a second electron rotation which exhibits a rotation axis perpen- dicular to the first ...
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The Atom Model of Helium and of Neon Based on the Theorem of Niels Bohr
... However, at least two restrictions have to be made: Firstly, this field model is solely valid for dot-like charges but not for whole atoms containing several charged particles, and being three-dimensionally extended. And ...
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Electron Impact Excitation of 2 1S State of Helium Atom
... Here in our model (Singh , 2004) the initial state distorted wave is generated by the static potential of the helium atom in the initial state (1 IS ) a nd the final state distorted wave[r] ...
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